Device for attaching conductors to brushes



w. SIEBENMORGEN.

DEVICE FOR ATTACHING CONDUCTORS T0 BRUSHES.

APPUCATION FILED Nov. 4, 1919.

1,438,686, Patented Oct. 31, 1922..

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l l g mm mum FIVENTOR ATTORNEY W. S'I'EBENMORGEN. DEVICE FOR ATTACHING CONDUCTORS TO BRUSHES.

APPLICATION FILED NOV. 4.1919.

Patented Oct. 31, 1922.

2 SHEETS-SHEET 2.

IN VEN TOR. %%2.

ATTORNEY 11111111111. 11111111111. f .......n .l ...J 11

VPatented Oct. 31, 1922.

UNITED STATES PATENTOFFICE.

WILLIAM SIEBENMORGEN, 0F WESTFIELD, NEW JERSEY, ASSIGNOR TO CORLISS CARBON COMPANY, A CORPORATION 0F PENNSYLVANIA.

DEVICE FOR ATTACHING CONDUCTORS TO BRUSHES.

Application tiled November 4, 1919.

To al? icfzom if may concern Be it known that I. VILLIAM SIEBENMOR- GEN. citizen of the nited States, and resident of ll'estfield. in the county of Union and State of New Jersey, have invented certain new and useful Improvementsin Devices for Attaching Conductors to Brushes. of which the following is a specification.

My invention relates to devices for attaching conductors to brushes for dynamo-electric apparatus.

The object of the invention is to provide a device of this character, which aifords a large area of contact and a high contact pressure between the brush and the attaching member, which is universally applicable to brushes of all sizes and particularly adaptable to brushes carrying large currents. and which is of simple. inexpensive construction.

This object of the invention and certain other features thereof set forth below. are attained as described inthe following specification having reference to the accompanying drawings, in which.

Figs. 1 and 2 are front and side elevations, respectively, of the preferred form of device embodying my invention, Fig. 1 being partly in section, the plane of the section being indicated in Fig. 2 by corresponding Roman numerals; Figs. 3 and 4. and 6, views similar to Figs. l and 2 but showing modified forms of construction: Figs. T. an isometric view of a third modified form.` and Fig. 8. a view showing a longitudinal section of Fig. 7.

Similar characters of reference denote similar parts in each of the several views.

In Figs. 1 and 2 of the drawing reference character l designates a carbon brush having secured thereto conductors or pigtails designated 2 and 2l respectively, the brush being for this purpose provided adjacent its upper end with a pair of holes ,7. extending between recessed portions 11 and 11a. The conductors consist of stranded copper wires to the ends of which arek secured flattened copper terminal sleeves 3 and 3a respectively, provided with holes 5 and 5a for fastening the same to corresponding terminals on the dynamo-electric machine. Midway between their ends the conductors have their strands spread apart and inserted between folded plates, designated 4 and 4a respectively,

Serial No. 335,597.

each plate being for this purpose provided with a pair of slots designated I). in the line of the fold. For the purpose of securing the plates to the brush, they are provided with openings for receiving the shanks of screws designated 6. two of which are provided for each plate. The outer member ot' each folded plate is dished to acconunodate the head of the screw and the inner member of each plate is dished similarly. but to a somewhat smaller diameter. as shown. The screws extend into internally threaded sleeves 8 located in holes T. and serve there to bind the plates into intimate engagement with the sides of the brush. The dished portions of the folded plates extend. it will be observed.y into the holes T and serve to prevent lateral sliding movement hetweeu the plates and the brush.

In the modification shown in Figs. 2 and 1 the brush is provided with a lateral hole in which a plug of conducting material. 1.3. is firmly embedded. This plug has four threaded transverse holes which register with holes of like diameter in the brush material. two of these holes being provided in each face of the brush. the holes` iu one face being staggered with respect to the holes in the other. The folded plates 4 and 1 are provided with holes which are so spaced that they register with the holes in the brush and the plug. Screws 11 extend through the holes in plate 4 and enter the plug 15 from one side and screws 14a pass through the holes in plate l to enter the plug from the other side. thus binding the plates securely and tirmly against the sides of the brush. The dished portions of the plates 4 and 1 register with similarly shaped depressions 25 in the sides of the brush, to prevent lateral slidingl movement betweenthe plates and the brush.

The modification shown in Figs. 5 and 6 is similar to the one described above, except that in place of the plug 15 the brush is provided with a rectangular bar 2O embedded in a groove extending transversely across the upper face of the brush. The screws 14 and 14 extend into threaded holes in the bar, and bind the plates 1 and 4* against the sides of the brush. similarly as in Figs and 4.

Still another modification of the invention is shown in Figs. '7 and 8 in which two atl'liw tional folded plates 4:6 and 4d are attached to the brush, these plates being secured to the." end faces of the brush, by means of screws is ample contact area and firm contact pres-y sure between the brush material and the conducting plates so that there is little or no heating even when the brushes are used for high amperage machines. F or exceptionally large currents the construction shown in Figs. 7 and `8 is particularly serviceable, although for ordinary purposes the first three forms will be found to givehighly efficient results. Ample current carrying capacity between the folded plates, 4 and 4a, and the terminals of the electric machine is secured by the use of a double conductor with each plate.

' Although only a few forms of devices embodying the invention are shownand described herein, it is readily understood ythat various changes and modifications may be made therein within the scope of the following claims without departing from the spirit and scope of theinvent-ion.

What l claim is:

1. In combination, a brush, a plurality of pigtailstherefor, means for securing said pig-tails on opposite faces of the brush, said means comprising a plurality of fastening members extending into the brush from opposite sides thereof and a member interior to the brush for (3o-operating with both of said fastening members.

2.y yIn combination,a brush, a pair of pigtails therefor, and means for securing said pig-tails to opposite faces of a brush, said means comprising a pair of plates of conducting 'material in engagement with said pig-tails, a pair of fastening members extending Vthrough each plate into the interior of the brush, and meansinterior tothe brush for receiving the said fastening members and co-operatin'g therewith to secure said plates on said brush.

3. In combination, a brush, a plurality of pig-tails therefor, and means for securing said pig-tails to opposite sides of the brush, said means comprising a member imbedded in said brush and parallel to the said sides thereof.

4. In combination, a brush having a recess on each of two opposite sides, a. plurality of conductors, terminals for said conductors embracing the ends thereof, and means for securing the said conductors in the said opposite recesses, member inserted the said opposite said lmeans comprising a in said brush parallel to 'sides thereof and securing Leases@ l devices co-operating with said member and said conductors.

5. ln combination, a brush, a plurality of folded plates having a slot at each end of the fold, a conductor extending outwardly from each slot, said plates and brush having corresponding transverse openings, a member embedded in the brush, and screws cooperating with said member, one screw extending through leach plate to bind thie same against the side of the brush.

6. In combination, a brush, -having an opening, a conductor, a member associated therewithvhaving a projecting portion eX- tending into said opening, and means for securing said member to said brush, said means comprising a plug imbedded in said brush.

7. In combination, a brush, having a plurality of holes, conductors therefor, members associated with said conductors having projecting portions extending into said holes i and means associated with said holes for binding said members against the sides 0f the brush.

8. 'ln combination, a brush, a plug embedded therein having transverse and longitudinal holes, plurality of members (zo-acting' with the transverse holes in said plug to clamp said conductors to opposite sides of the brush, and a plurality of other members co-acting with the longitudinal holes in the plug to clamp certain other of said conductors to the remaining opposite sides of the brush.

9. In combination, a brush, a plug imbedded therein having transverse holes, a plurality of conductors and a plurality of members co-acting with the said transverse holes in said plug to clamp said conductors to opposite sides of the brush.

ll0. In combination, a brush, a plurality of recesses therein on opposite sides of the brush, a plurality of pig-tails for said brush, a plug imbedded in said brush and members co-operating with said plug and extending thereinto from opposite sides for securing said pig-tails in said recesses.'

l1. In combination, a brush, al plurality of pairs of pig-tails therefor, a plurality of plates of conducting material for securing said pairs of pig-tails at opposite faces of the brush, threaded fastening members extending through said plates and into the interior of the brush, and securing means interior to said brush provided with threads for co-operating with the opposed fastening members for securing said plates on said opposite faces. v

Signed at New `York in the county of New York and State of New York this 3rd day, of November A. D. 1919.

WILLIAM sIEBENMoRGEN.

a plurality of conductors, a` 

